Safety device



Dec 1 1925- 1,563,422 W. H. M CLELLAND SAFETY DEVICE Filed Dec. 15, 1924 5 Sheets-Sheet 1 al Event o1.

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Dec. 1,1925- 1,563,422 v w. H. MCCLELLAND SAFETY DEVICE Filed Dec. 15, 1924 5,;Sleets-Sheet 2 IIIIN I 86 34 177W? as E SAFETY DEVICE Patented Dec. 1, 1925.

UNITED STATES PATENT OFFICE.

WILLIAM H. MCCLELLAND, OF HUNTINGDON, ZPENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 RAY I. M. DAVIS, 01! MOUNT UNION, PENNSYLVANIA.

SAFETY DEVICE.

Application filed December 15, 1924-.

To all whom it may concern:

Be it known that VILLIAM H. MGCLEL- LAND, a citizen of the United States of America, residing at Huntingdon, in the county of Huntingdon and State of Pennsylvania, has invented certain new and useful Improvements in Safety Devices, of which the following is a specification.

My invention relates to improvements in brick machines and is more particularly directed to that type of machine wherein the same moves, as a unit, back and forth between a pair of spaced conveyors and alternately deposits upon each the green bricks as they are formed and passed out by the machine, the conveyors then carrying them into suitable baking furnaces.

The object of my invention is to provide means for automatically stopping the operation and movement of the machine in the event the load carried thereby proves too great or that the machine itself develops trouble which will prevent its operation and movement.

A further object of my invention is to provide spring controlled means for connecting the machine to a rocker element, the latter being the means through which the machine is caused to move back and forth.

Another object of my invention is to provide means actuated upon the overload carried by the machine for disconnecting the same from the rocker element.

Still a further object of my invention is to provide means actuated upon the disconnection of the machine from the rocker. element for operating a main electrical switch which controls the various motors of the machine and the motor for operating the rocker element.

Another object of my invention is to provide a control means for brick making machines which will lessen the labor incident to making brick, thereby cutting down the expense of'operation and greatly increasing the production of the machine.

Other and further objects and advantages of my invention will be in part obvious and in part described as the specification is proceeded with. I

In the accompanying drawings Figure 1 is an assembly of a brick making machine having connected thereto means for moving the same back and forth, said means Serial No. 755,938.

including a second means for automatically disconnecting the two.

Figure 2 is a vertical sectional View taken upon the line 2-2 of Figure 5.

Figure 3 is a detail view of one of the main side plates.

Figure 4: is an end elevation of the same, and

Figure 5 is an end elevation of the control means as connected and mounted within the rocker element.

Broadly speaking, my invention is adapted for use in the following described manner and is connected to a brick machine of the type described as illustrated in Figure 1 of the drawings. Referring to this figure it willbe noted that the brick making machine is indicated by the letter A, while the letter l3 indicates a rocker element which is connected to the machine A by means of a connecting rod C. That end of the connecting rod C which is connected to the rocker element B engages certain means carried thereby which will automatically permit the con necting rod to free itself upon the overloading or the stopping of the machine proper, and at the same time the connecting rod is disconnected the main electrical switch is operated, thereby breaking the circuits leading to the several motors carried by the machine and that for operating the rocker element. It is this means for automatically releasing the connecting rod from the rocker element that I consider the salient point of my invention and I will now endeavor to fully describe the same.

, Referring to the accompanying drawings in detail, wherein like reference characters denote corresponding parts throughout the several views, the numeral 1 indicates pairs of spaced and downwardly diverging channel beams of which the rocker element B is composed, the upper ends of which have passing therethrough a shaft 2, upon which the element as a unit rocks. The shaft 2 is mounted within suitable bearings carried by a horizontally disposed beam 3. The lower end portions of the beams 1 are connected by a cross beam 4. the intermediate side portions of which have connected thereto downwardly extending channel beams 5, and it is between this pair of beams that my improved means is placed.

As disclosed. Figures 2 and 5, the ad Fifi jacent faces of the channel beams 5 have each secured thereto ametallic plate 6, which is, as illustrated in Figure 3, substantially of a diamond shape. The face of each plate 6 has secured adjacent its upper corner a shaft bearing 7, which surrounds an opening 8, a pair of blocks 9 each of which is provided with a seat 10 the purpose 01 which will be hereinafter apparent, and spaced guide elements 11, all of which will be fully explained as the description proceeds.

As disclosed in Figure 5 it will be noted that each plate 6 is secured to its respective beam 5 in horizontal alignment, and the opening 3 of each receives therein the end portion of a shaft 12, upon which is mounted a swinging unit.

The swinging unit is composed of a pair of similarly formed metallic plates 13, the shape of which is fully disclosed in Figure 9 the upper portions of which are connected by a tubular sleeve 14-, and further retained in spaced relation by means of an I-beam 15 which is secured to each plate 13 by means of rivets 16 or the like.

The outer corner of each plate 13 is provided with a cutout portion to orm a seat 17 which receives therein the adjacent end portion of a bolt 13, the end portion of which rests within the seat 10 formed in the block 9 carried by the plate 6. lVhile I have merely described one end portion of the bolt 18 it is of course to be understood that the other end portion of the bolt is received within similar seats carried by the plates 6 and 13.

One 01" the bolts 13 is provided with a squared intemediate portion 19 which has extending therethrough at right angles the stem of a threaded bolt 20, which is retained in adjusted position with respect thereto by a nut 21. The stem of the bolt 20, that portion adjacent its head, is received within an opening formed in the base of a U-shaped member 22, the leg portions of which are connected by a bolt 23, which has coiled thereabout one end of a coiled tension spring 2%, the other end of which is con nected in a similar manner to the bolt 18.

The extreme lower portion of each plate 13 is provided with a cutout 95 which receives therein the end portions of a pin 26, the intermediate portion of which has fixed thereon one end of the connecting rod C which passes to the brick making machine A. the extreme end portions of the pin 26 are further received between the guide elements 11.

From the foregoing description it will be fully apparent that in the event the machine A is prevented from moving, and that the rocker element 13 continues to move by rea son of power being connected thereto, the swinging unit formed of the plates 13 will be caused to swing upon the shaft 12 and during this swinging movement will move the pin 26 longitudinally of its guide elements 11 until the same is free thereof, whereupon it will drop out of its seat provided in the plates 13. During this swing ing movement, and assuming that the plates 13 move in the direction of the arrow shown in Figure 2, the bolt 13 will be prevented from moving with the plates 13 by reason ot' the fact that its end portions are caught and retained within the seats 10 of the blocks 9, which are carried by the plates (3, the latter being a rigid part of the rocker l3 and moved therewith. \Vhile this bolt 18 is being held stationary with respect to the plates 6, the other bolt 18 engaged by the seats 17 of the plates 13 and moved therewith, freeing the same of the seats 10 provided in the block 9. Upon the freeing ot the connecting rod 0, the plates 13 are returned to their original position by means f the spring 2-1.

In order to control the operation of a main electrical switch for the entire machine and its operating means, I show the switch 30 as being connected to one of the beams 5 and as provided with an operating lever 31 which is pulled to an off position by means of a spring 32 which is likewise connected to the beam 5. The end portion of the lever 31 is provided with a notch 33 which receives therein the edge portion of a U shaped member 34, pivoted to the other beam 5 as indicated at 35. Thus it will be apparent that when the lever 31 is moved to its on position it may be retained in such a position by means of the member 3 1-.

To provide for the operation of the switch 30 upon movement of the swinging unit, composed of: the plates 13, the legs of the U-shaped member 34 are connected by a pair of spaced bars 36, which have mounted therebetween a roller 37 which is adapted to be engaged by cams 38 and 39 formed upon the end portion of: a member 1O secured to one of the plates 13 and movable therewith. Upon referring to Figure 2 it will be noted that the cams are spaced apart to provide a space 40' which permits the U-shaped member 3-1: to drop, when the plates 13 are in their normal position, and hold the switch lever 31 in an operative position.

Upon again referring to Figure 2 it will be apparent that in use the switch lever 31 is tripped before the connecting rod C is disengaged from the pin 26, and the time interval may be controlled by the space between the cams, either enlarging or decreasing the length of the same, and by the length of the guide bars 11.

As disclosed in Figures 2 and 5 it will be noted that each plate 13 is provided with bearing blocks 4-1 adjacent the seats 17 and a similar block 42 adjacent the cutout 25.

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From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a brick making machine, a rocking element for moving the same as a unit, a member for connecting the two, and means for disconnecting the element from said member upon the developing of adverse working conditions in said machine.

2. In a brick making machine, a rocking element for moving the same as a unit, a member connecting said element to said machine, and means carried by said element for releasing the member therefrom upon the developing of adverse working conditions in said machine.

3. In a brick making machine, a rocking element for moving the same as a unit, elec trically operated devices for operating said machine and element, a member connecting said element to said machine, and means car ried by said element for releasing the member therefrom and cutting off said electrical devices upon the developing of adverse working conditions in said machine.

4:. A brick making machine adapted to' be n'ioved back and forth to deposit its work upon carriers, a rocking element, a connecting rod passing from said element to said machine to cause the movement of the latter, and means carried by said element for releasing the connecting rod therefrom upon the developing of adverse working conditions in said machine.

5. In a brick making machine, a rocking element for moving the same back and forth to deposit its work upon carriers, and means for stopping the operation of said element upon the developing of adverse working conditions in said machine.

6. In a brick making machine, a rocking element for moving the same back and forth, a connecting rod passing from said element to said machine, a swinging unit carried by said element and retaining said connecting rod thereto during normal working conditions, and said. unit adapted to release said connecting rod from said element upon the developing of adverse working conditions in said machine.

7. In a brick making machine of the class described, the combination of a rocking ele ment and a connecting rod, the latter connecting said machine to said element, and said element having resiliently controlled means for releasing said connectin rod therefrom upon the developing of ac verse working conditions in said machine.

8. In a brick making machine of the class described, the combination of a rocking element and a connecting rod, said rod connecting said element to said machine, aswinging unit carried by said element for locking said rod thereto, resilient means engageable with said swinging unit and element for maintaining the said unit in a normal position during normal working conditions, and said swinging unit adapted to permit the releasing of said connecting rod from said element upon the developing of adverse working conditions in said machine.

9. In a brick making machine, a rocking element of the class described adapted to be connected thereto for moving the same back and forth, and said element including means for releasing said machine therefrom upon the developing of adverse working conditions in said machine.

10. In a brick making machine, a rocking element adapted for moving the said machine back and forth, a connecting rod passing from said element to said machine, electrically operated means for operating said element and machine, a swinging unit carried by said element and retaining said connecting rod thereto during normal working conditions, and said unit adapted to release said connecting rod from said element and control said electrical means upon the developing of adverse working conditions in said machine.

. 11. A brick making machine adapted to be moved back and forth to deposit its work upon carriers, a rocking element, a connecting rod passing from said element to said machine, a swinging unit carried by said element for locking said rod thereto, resilient means engageable by said element and unit for moving the two as one under normal con ditions, and said resilient means permitting the movement of said unit with respect to said element during adverse conditions to disconnect said connecting rod from said element.

12. A brick making machine adapted to be. moved back and forth to deposit its work upon carriers, a rocking element, a connecting rod passing from said element to said machine, a guide way in said element for receiving therein said rod, a swinging member for retaining said rod therein, resilient means for holding said swinging member in an operative position, and said resilient means permitting the movement of said swinging member with respect to said ele ment to detach the connecting rod therefrom.

In testimony whereof I aflix my signature.

WILLIAM H. MGCLELLAND.

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